| Autor: |
P. G. Estabrooks, D. W. G. S. Leith, S. Williams, S. Suzuki, W. Dunwoodie, A. C. McPherson, W.B. Johnson, S. Durkin, B. N. Ratcliff, J. Va'vra, R. J. Hemingway, R. K. Carnegie, D. Hutchinson, T. A. Lasinski, D. Aston, G. K. Oakham, L. Levinson, B. T. Meadows, W. T. Meyer, S. Shapiro, A. Honma, P. F. Kunz, T. Shimomura, R. McKee |
| Rok vydání: |
1985 |
| Předmět: |
|
| Zdroj: |
Physical Review D. 32:2270-2287 |
| ISSN: |
0556-2821 |
| DOI: |
10.1103/physrevd.32.2270 |
| Popis: |
Large samples of inclusively produced ${\ensuremath{\Xi}}^{\mathrm{\ensuremath{-}}}$, ${\ensuremath{\Omega}}^{\mathrm{\ensuremath{-}}}$, and ${\ensuremath{\Xi}}^{0}$(1530) events are presented from a 1427 events/\ensuremath{\mu}b exposure of the large-aperture superconducting-solenoid spectrometer to an 11-GeV/c ${K}^{\mathrm{\ensuremath{-}}}$ beam. Production characteristics of these states are compared with other data and shown to be consistent with hyperon exchange. Polarization of ${\ensuremath{\Xi}}^{\mathrm{\ensuremath{-}}}$ shows an increase in magnitude with both Feynman x and transverse momentum. The ${\ensuremath{\Xi}}^{\mathrm{\ensuremath{-}}}$ decay parameters are measured to be ${\ensuremath{\alpha}}_{\ensuremath{\Xi}}$=-0.40\ifmmode\pm\else\textpm\fi{}0.03 and ${\ensuremath{\Phi}}_{\ensuremath{\Xi}}$=(5\ifmmode\pm\else\textpm\fi{}10)\ifmmode^\circ\else\textdegree\fi{} . Results of searches for higher-mass hyperons are presented. The ${\ensuremath{\Xi}}^{\mathrm{\ensuremath{-}}}$(1820)\ensuremath{\rightarrow}${\ensuremath{\Xi}}^{0}$(1530)${\ensuremath{\pi}}^{\mathrm{\ensuremath{-}}}$ decay is observed, while we fail to confirm the existence of the ${\ensuremath{\Sigma}}^{+}$(3170). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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